CONSOLIDATED STATEMENT OF INCOME (LOSS) (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Revenue
Total Revenue	$ 5,634	$ 5,356	$ 10,857	$ 12,811
Interest & other income	16	33	35	72
Expenses
Research & engineering	134	142	268	315
General & administrative	70	81	150	208
Impairments & other		3,724		12,247
Interest	136	144	272	281
Income (loss) before taxes	542	(3,627)	928	(11,716)
Tax expense (benefit)	99	(199)	173	(920)
Net income (loss)	443	(3,428)	755	(10,796)
Net income attributable to noncontrolling interests	12	6	25	14
Net income (loss) attributable to Schlumberger	$ 431	$ (3,434)	$ 730	$ (10,810)
Basic income (loss) per share of Schlumberger	$ 0.31	$ (2.47)	$ 0.52	$ (7.79)
Diluted income (loss) per share of Schlumberger	$ 0.30	$ (2.47)	$ 0.51	$ (7.79)
Average shares outstanding:
Basic	1,398	1,388	1,398	1,388
Assuming dilution	1,421	1,388	1,420	1,388
Services
Revenue
Total Revenue	$ 3,789	$ 3,721	$ 7,271	$ 9,147
Expenses
Cost of services and sales	3,223	3,383	6,255	8,109
Product
Revenue
Total Revenue	1,845	1,635	3,586	3,664
Expenses
Cost of services and sales	$ 1,545	$ 1,542	$ 3,019	$ 3,439